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split out ApplyHotPinkColorKey

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simplify 16-bit texture format selection: if it's colorkeyed,
actualID.iAlphaBits will be set to at least 1; if none, 0
This commit is contained in:
Glenn Maynard
2004-05-17 01:45:03 +00:00
parent d98918b029
commit d98b9475f3
1 changed files with 3 additions and 53 deletions
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stepmania/src/RageBitmapTexture.cpp
+3 -53
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@@ -81,45 +81,7 @@ void RageBitmapTexture::Create()
}
if(actualID.bHotPinkColorKey)
{
// HACK: Some Pump banners and DDR PC textures have (248,0,248) as the color key.
// Search the edge for (248,0,248). If we find it, use that as the color key.
// TODO: Get rid of this hack and save DDR PC textures in a format that supports alpha.
bool bUse248 = false;
{
const uint8_t *p = (uint8_t*)img->pixels;
for( int i=0; i<img->w; i++ )
{
uint8_t color[4];
mySDL_GetRGBAV( p, img, color );
if( color[0]==248 && color[1]==0 && color[2]==248 )
{
bUse248 = true;
goto apply_color_key;
}
p += img->format->BytesPerPixel;
}
}
{
const uint8_t *p = (uint8_t*)img->pixels;
p += img->pitch * (img->h-1);
for( int i=0; i<img->w; i++ )
{
uint8_t color[4];
mySDL_GetRGBAV( p, img, color );
if( color[0]==248 && color[1]==0 && color[2]==248 )
{
bUse248 = true;
goto apply_color_key;
}
p += img->format->BytesPerPixel;
}
}
apply_color_key:
int color = mySDL_MapRGBExact(img->format, bUse248 ? 248 : 0xFF, 0, bUse248 ? 248 : 0xFF);
if( color != -1 )
SDL_SetColorKey( img, SDL_SRCCOLORKEY, color );
}
ApplyHotPinkColorKey( img );
{
/* Do this after setting the color key for paletted images; it'll also return
@@ -210,14 +172,6 @@ apply_color_key:
SDL_FreeSurface(img);
img = dst;
}
if( img->format->BitsPerPixel == 8 && actualID.iGrayscaleBits == -1 && !(img->unused1 & ALPHA_PALETTE) )
{
/* Unless we set up the palette ourself, assume the "unused" bit is undefined,
* and set it to 255. We use it for alpha. */
for( int index = 0; index < img->format->palette->ncolors; ++index )
img->format->palette->colors[index].unused = 0xFF;
}
/* Figure out which texture format to use. */
// if the source is palleted, load palleted no matter what the prefs
@@ -235,13 +189,9 @@ apply_color_key:
/* Bits of alpha in the source: */
int src_alpha_bits = 8 - img->format->Aloss;
/* No real alpha in paletted input. */
/* Aloss is wrong when BytesPerPixel == 1. */
if( img->format->BytesPerPixel == 1 )
src_alpha_bits = 0;
/* Colorkeyed input effectively has at least one bit of alpha: */
if( img->flags & SDL_SRCCOLORKEY )
src_alpha_bits = max( 1, src_alpha_bits );
src_alpha_bits = 8;
/* Don't use more than we were hinted to. */
src_alpha_bits = min( actualID.iAlphaBits, src_alpha_bits );